Water tight watch-case

Abstract

A watch-case comprises, superposed onto the case-band (1), a sealing gasket (4), a ring forming a flange (2) and a watch-glass (3). The thus-formed assembly is fixed to the case-band by means of claws (10) which grip the watch-glass and which are arranged on the periphery of the case-band. The claws are provided with an internally threaded portion (11) which fits into an opening (7) provided on the periphery of the watch-glass and which receives a screw (12) the head of which is supported by a cut-out provided on the underside of the case-band.

What we claim is: 
     
       1. A water tight watch case comprising: a case band;   an annularly-shaped flange superposed onto the case band and a watch glass supported by the flange and extending across an opening of the annularly-shaped flange;   at least two claws each having a generally L-shape with a first leg of the L being positioned over and adjacent an upper surface of the watch glass and the second leg extending downwardly along the case band, the first leg of each claw being provided with a threaded portion adapted to fit into an opening provided in the watch glass; and,   for each claw a screw passing through an opening in said watch band to mesh with said threaded portion of said first leg inside the general outer periphery of said watch glass;   thereby to assure the fixing of the watch glass to the watch case.   
     
     
       2. A water tight watch case as recited in claim 1 wherein said watch glass defines an outer periphery which is generally similar in shape and size to the outer periphery of the case band. 
     
     
       3. A watch-case as set forth in claim 1 wherein the watch-glass is cemented onto a ring forming the flange and the thus-formed assembly is fixed to the case-band by the bearing of the threaded portion of the claws onto the ring, the height of said threaded portion being greater than the thickness of the watch-glass in order to prevent the claws from bearing directly onto the watch-glass. 
     
     
       4. A watch-case as set forth in claim 3 wherein the portion of the ring in contact with the watch-glass is provided with a groove arranged to received excess cementing material. 
     
     
       5. A watch-case as set forth in claim 3 wherein a sealing gasket is arranged between the ring and the case-band. 
     
     
       6. A watch-case as set forth in claim 1 wherein the flange is integrally formed with the case-band, the threaded portion being further adapted to fit into an opening provided in the flange whereby the watch-glass is fixed onto the flange by direct bearing of the claws onto the watch-glass. 
     
     
       7. A watch-case as set forth in claim 6 wherein a sealing gasket is arranged between the flange and the watch-glass.